Time & windows

6 h
requires FLK-02

From your world. late-arriving facts and the as-of grain in your SCD2 / event marts

Practice quiz with instant feedback. For a scored run that counts toward your local progress, use uv run de quiz FLK-03.

5The watermark of a keyed operator is the MINIMUM across its input partitions. One partition goes quiet (no events). Without idleness, what happens to windows on the busy partitions? AThey keep firing normally BThey stop firing because the combined watermark freezes at the last value of the quiet partition CThey switch to processing time DThey fire twice as fast

6withIdleness(Duration.ofSeconds(10)) does what? APauses the job for 10 seconds BMarks a partition idle after 10s of no events. This excludes it from the watermark minimum, so windows fire on the active partitions CDrops events older than 10 seconds DSets the window size to 10 seconds